Demodulation and despreading from frequency samples

Shunichiro Egami, Katsumi Sugiyama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

By the advent of the fast DSP, now, it is possible to change whole over 100MHz bandwidth to frequency samples. This paper propose methods of PSK demodulation and CDMA despreading both starting from frequency samples. PSK signal frequency samples are selected from the whole frequency samples which covers total beam bandwidth. After selecting frequency samples, samples are decimated to appropriate lower rate. Then, frequency samples are transformed to time samples by IFFT. Time samples are squared and transformed again to frequency samples. The first and the second peaks are used to recover carrier information. In case of CDMA, frequency domain correlation method is applied. The code for despreading is transformed to frequency samples by FFT. Then fast correlation method is applied to despreading or despreading synchronization.

Original languageEnglish
Title of host publication21st International Communications Satellite Systems Conference and Exhibit
Publication statusPublished - 2003 Dec 1
Externally publishedYes
Event21st International Communications Satellite Systems Conference and Exhibit, ICSSC 2003 - Yokohama, Japan
Duration: 2003 Apr 152003 Apr 19

Publication series

Name21st International Communications Satellite Systems Conference and Exhibit

Other

Other21st International Communications Satellite Systems Conference and Exhibit, ICSSC 2003
CountryJapan
CityYokohama
Period03/4/1503/4/19

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Atmospheric Science
  • Electrical and Electronic Engineering
  • Media Technology

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